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TP53 abnormalities correlate with immune infiltration and are associated with response to flotetuzumab, an investigational immunotherapy, in acute myeloid leukemia

ABSTRACT: Immunological classifiers that predict patient outcome and therapeutic responses have been constructed through targeted immune gene expression profiling of diagnostic bone marrow samples from patients with TP53-mutated acute myeloid leukaemia.

ORGANISM(S): Homo sapiens

PROVIDER: GSE146204 | GEO | 2020/09/21

REPOSITORIES: GEO

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IMMUNE LANDSCAPES PREDICT CHEMOTHERAPY RESISTANCE AND IMMUNOTHERAPY RESPONSE IN ACUTE MYELOID LEUKAEMIA

2020-06-03 | GSE134589 | GEO

IMMUNE SENESCENCE PHENOTYPES PREDICT CHEMOTHERAPY RESISTANCE IN ACUTE MYELOID LEUKAEMIA

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TP53 abnormalities correlate with immune infiltration and associate with response to flotetuzumab immunotherapy in AML.

Project description:Somatic TP53 mutations and 17p deletions with genomic loss of TP53 occur in 37% to 46% of acute myeloid leukemia (AML) with adverse-risk cytogenetics and correlate with primary induction failure, high risk of relapse, and dismal prognosis. Herein, we aimed to characterize the immune landscape of TP53-mutated AML and determine whether TP53 abnormalities identify a patient subgroup that may benefit from immunotherapy with flotetuzumab, an investigational CD123 × CD3 bispecific dual-affinity retargeting antibody (DART) molecule. The NanoString PanCancer IO360 assay was used to profile 64 diagnostic bone marrow (BM) samples from patients with TP53-mutated (n = 42) and TP53-wild-type (TP53-WT) AML (n = 22) and 45 BM samples from patients who received flotetuzumab for relapsed/refractory (R/R) AML (15 cases with TP53 mutations and/or 17p deletion). The comparison between TP53-mutated and TP53-WT primary BM samples showed higher expression of IFNG, FOXP3, immune checkpoints, markers of immune senescence, and phosphatidylinositol 3-kinase-Akt and NF-?B signaling intermediates in the former cohort and allowed the discovery of a 34-gene immune classifier prognostic for survival in independent validation series. Finally, 7 out of 15 patients (47%) with R/R AML and TP53 abnormalities showed complete responses to flotetuzumab (<5% BM blasts) on the CP-MGD006-01 clinical trial (NCT #02152956) and had significantly higher tumor inflammation signature, FOXP3, CD8, inflammatory chemokine, and PD1 gene expression scores at baseline compared with nonresponders. Patients with TP53 abnormalities who achieved a complete response experienced prolonged survival (median, 10.3 months; range, 3.3-21.3 months). These results encourage further study of flotetuzumab immunotherapy in patients with TP53-mutated AML.

| S-EPMC7594389 | biostudies-literature

TP53 abnormalities correlate with immune infiltration and are associated with response to flotetuzumab, an investigational immunotherapy, in acute myeloid leukemia

Project description:TP53 abnormalities correlate with immune infiltration and are associated with response to flotetuzumab, an investigational immunotherapy, in acute myeloid leukemia

| PRJNA609693 | ENA

IMMUNE CORRELATES OF RESPONSE TO IMMUNE CHECKPOINT BLOCKADE IN ACUTE MYELOID LEUKAEMIA

Project description:Immunological classifiers that predict patient outcome and therapeutic responses have been constructed through targeted immune gene expression profiling of pre-treatment bone marrow samples from patients with acute myeloid leukaemia treated with pembrolizumab and hypomethylating agent azacytidine (clinicaltrials.gov identifier: NCT02845297).

2022-09-16 | GSE178926 | GEO

Single-Cell Multi-Omics Identifies Chronic Inflammation as a Driver of TP53 mutant Leukaemic Evolution

Project description:TP53 is the most commonly mutated gene in human cancer, typically occurring in association with complex cytogenetics and dismal outcomes. Understanding the genetic and non-genetic determinants of TP53- mutation driven clonal evolution and subsequent transformation is a crucial step towards the design of rational therapeutic strategies. Here, we carry out allelic resolution single-cell multi-omic analysis of haematopoietic stem/progenitor cells (HSPC) from patients with a myeloproliferative neoplasm who transform to TP53- mutant secondary acute myeloid leukaemia (AML), a tractable model of TP53 -mutant cancer evolution.

2023-05-10 | GSE226340 | GEO

Compare proB cells from WT, Tp53-/-, Lnk-/-, Tp53-/-Lnk-/- mice and Tp53-/-Lnk-/-B-ALL

Project description:The adaptor protein LNK (SH2B3) has emerged as an important protein in regulating B cell development B cell leukemia. Loss-of-function mutations in LNK (SH2B3) are found in Philadelphia chromosomeâlike acute lymphoblastic leukemia (Ph-like ALL), but how LNK regulates normal B cell development or promotes leukemogenesis remains unclear. We found that combined loss of Lnk and tumor suppressors Tp53 in mice triggers a highly aggressive and transplantable precursor B-ALL. This study aims to investigate the molecular mechanism by which LNK regulates B-ALL development. We performed expression profiling of bone marrow proB progenitors from WT, Tp53-/-, Lnk-/- and preleukemic healthy Tp53/Lnk double knockout (DKO) mice, as well as leukemic bone marrow cells from DKO mice that have developed B-ALL. Results suggest that Tp53-/-Lnk-/- B-ALLs display similar gene expression profiles to human Ph-like B-ALLs, suggesting this model for preclinical and molecular studies. B220+CD19+CD43+AA4.1+IgM-NK1.1-Ly6c- bone marrow proB cells were double sorted from WT, Tp53-/-, Lnk-/- and preleukemic healthy Tp53/Lnk double knockout (DKO) mice, as well as leukemic bone marrow cells from DKO mice that have developed B-ALL. RNA was isolated using miRNeasy kit from QIAGEN and processed using the NuGEN Pico kit. The microarray analysis was performed at the PENN Molecular Profiling/Genomics Facility using GeneChip Mouse Gene 2.0ST array (Affymetrix).

2016-04-01 | E-GEOD-76940 | biostudies-arrayexpress

nascent proteome analysis of HCT116 TP53 wild type and TP53 knockout cells treated with Neocarcinostatin (NCS) for 6h

Project description:In order to investigate the potential role of TP53 in regulating translation, HCT116 wild type and TP53 knockout cells were analyzed using both RNA sequencing, Ribosome sequencing and nascent proteome analysis. The cells were treated with 0.2 µg/ml Neocarcinostatin (NCS) to induce DNA damage and activate TP53.

2022-04-27 | PXD029512 | Pride

TP53 in lung

Project description:TP53 in lung

| PRJEB58849 | ENA

Genomic profiling of TP53 and non-TP53 Li-Fraumeni syndrome tumors reveals hits in the p53 and overlapping pathways

Project description:Li-Fraumeni syndrome (LFS) is a rare, clinically and genetically heterogeneous inherited cancer syndrome. Most cases are due to mutations in TP53. CHK2 is a minor predisposing locus; we recently mapped a third locus to 1q23. In both TP53 and non-TP53 LFS, there is evidence for risk heterogeneity within and between kindreds, suggesting additional risk modifiers. Using BAC- and SNP-based microarrays, we performed genomic profiling of primary soft tissue sarcomas, osteosarcomas and matching constitutive samples of 10 LFS patients (6 with and 4 without TP53 mutations), to identify genome-wide patterns of copy number changes and loss-of-heterozygosity (LOH). Our complementing global approaches revealed several interesting patterns for TP53 and non-TP53 LFS tumors, including positive (1q/7, 3p/15, 4q/9q, 8q/19p, 9p/10q, 13/14 and 15q/18q) and negative (2q/9q, 3q/14q and 4q/6q) associations between chromosomal regions. The region containing the oncogene TWIST1 (7p21.1) was the most common gain independent of TP53 status and tumor type, while LOH of 8q11.2 with the tumor suppressor ST18 was the only region exclusively associated with non-TP53 soft tissue sarcomas. We resequenced known mutations in BRAF, KRAS and NRAS and identified somatic NRAS mutations in 2 of 10 tumors. TP53 and non-TP53 LFS tumors shared multiple hits in genes of the p53 and overlapping pathways. Although common dogma in cancer genetics holds that multiple hits in the same pathway are redundant and thus unlikely, we show that different combinations of genetic alterations in both TP53 and non-TP53 LFS tumors appear to act together in the p53 network in LFS tumorigenesis Keywords: Comparative genomic hybridization Using the Spectral Genomics dye-swap BAC arrays we studied 10 Li Fraumeni syndrome tumor cases

2008-07-16 | E-GEOD-8798 | biostudies-arrayexpress

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